HSP70诱饵载体的构建及其在酵母双杂交系统中自激活作用的检测

目的：构建用于酵母双杂交系统的“诱饵”载体pGBKT7-Hsp70，并检测其是否具有自激活作用。方法：用PCR的方法从质粒pGBKT7-Hsp70中扩增出Hsp70基因片段，引入酶切位点EcoRⅠ，BamHⅠ，测序正确后，将Hsp70基因克隆至载体pGBKT7中，并检测pGBKT7-Hsp70在MATHMAK－ER GAL4 Two-Hybrid System3中的自激活作用。结果：成功构建了“诱饵”载体pGBKT7-Hsp70，并证明其在酵母双杂交系统中无自激活作用。结论：pGBKT7-Hsp70可以用于酵母双杂交系统中，寻找与Hsp70相互作用的分子。     

杜氏盐藻S腺苷高半胱氨酸水解酶酵母双杂交诱饵载体的构建及自激活和毒性检测

目的:构建杜氏盐藻S腺苷高半胱氨酸水解酶(SAHH)的酵母双杂交诱饵载体pGBKT7-SAHH,并检测其对酵母细胞的毒性和自激活作用。方法:应用RT-PCR扩增杜氏盐藻的SAHHcDNA,测序分析后与酵母双杂交诱饵载体pGBKT7连接,构建诱饵载体pGBKT7-SAHH。用PEG/LiAc法将诱饵载体转入AH109和Y187酵母中,通过表型筛选检测诱饵蛋白对酵母有无毒性和自激活作用。结果:成功构建了诱饵载体pGBKT7-SAHH并成功转化到酵母细胞AH109和Y187中,表达的融合蛋白对宿主酵母细胞无毒性。在AH109和Y187酵母细胞中诱饵载体均未激活报告基因HIS3和ADE2,但是激活了报告基因MEL1。结论:诱饵载体pGBKT7-SAHH可用酵母双杂交方法筛选与SAHH相互作用的蛋白。     

COX-2诱饵载体的构建及其在酵母双杂交系统中自激活作用的检测

目的构建环氧化酶-2(cyclooxygenase-2,COX-2)的诱饵载体,为应用酵母双杂交系统(yeast two-hybrid system)筛选与COX-2相互作用的蛋白建立实验基础。方法 PCR扩增COX-2基因编码区全长,引入酶切位点EcoRⅠ、BamHⅠ,将COX-2基因克隆至载体pGBKT7中,将构建好的诱饵载体pGBKT7-COX-2转化到酵母细胞Y190中,检测pGBKT7-COX-2在Mathmaker GAL4Two-Hybrid System3中有无自激活作用。结果 成功扩增了COX-2基因编码区全长,并克隆入pGBKT7中,测序结果正确,并成功转化到酵母细胞Y190中,检测无自激活作用。结论 成功构建了COX-2的酵母诱饵载体,为进一步运用酵母双杂交技术筛选与之相互作用的蛋白奠定了基础。     

神经退行性疾病潜在致病肺炎衣原体蛋白Cpn0147酵母双杂交诱饵载体的构建

目的：构建Cpn0147酵母双杂交诱饵载体,为应用酵母双杂交系统筛选与其相互作用的蛋白奠定基础。方法： 应用PCR扩增技术获得Cpn0147基因片段,克隆入pGBKT7载体,鉴定构建是否成功,确定构建成功后将重组载体pGBKT7-Cpn0147转入AH109及Y187酵母中,进行诱饵载体的毒性及自激活活性分析。结果：Cpn0147诱饵载体构建成功,且该诱饵载体无自激活活性,对两种宿主酵母细胞无毒性。结论：诱饵载体pGBKT7-Cpn0147可用于酵母双杂交系统,为进一步筛选与之相互作用蛋白提供了实验基础。     

Survivin基因诱饵表达载体的构建和鉴定

目的 构建Survivin基因诱饵表达载体,为建立酵母双杂交系统筛选Survivin蛋白靶蛋白奠定基础.方法 从人K562细胞中提取总RNA作为模板,逆转录得到Survivin cDNA,通过特异引物扩增Survivin基因的ORF区,然后与诱饵表达载体pGBKT7连接,构建诱饵表达载体pGBKT7-Survivin,再把构建好的诱饵载体pGBKT7-Survivin转化到酵母AH109细胞中,并用Western blot分析诱饵蛋白的表达情况.同时检测诱饵蛋白的毒性和自激活作用.结果 成功扩增了Survivin基因的ORF区,并成功将其克隆到诱饵表达载体pGBKT7中,测序结果 正确.诱饵载体成功转化到酵母AH109细胞中,无毒性和自激活作用,Western blot分析证实了酵母细胞高表达诱饵蛋白.结论 成功构建了Survivin基因的ORF区的酵母诱饵表达载体,为建立酵母双杂交系统筛选Survivin蛋白靶蛋白奠定基础.     

Stra8酵母双杂交诱饵载体的构建及自激活活性分析

目的 构建小鼠Stra8的诱饵表达载体,为应用酵母双杂交系统筛选与Stra8相互作用的蛋白建立实验基础.方法 应用PCR扩增Stra8编码序列的不同长度片段,将其先克隆入pGBKT7载体内,经序列测定确认无误后,将构建好的系列诱饵载体pGBKT7-Stra8转化到酵母细胞AH109及Y187中,进行诱饵载体的毒性及自激活活性分析.结果 构建了Stra8的诱饵载体共8种,经过自激活活性的分析发现,其中7种诱饵载体均具有自激活活性,仅有一种诱饵载体没有自激活活性,可用于后续的酵母双杂交筛选实验.结论 成功构建了Stra8的酵母双杂交诱饵表达载体,为进一步筛选与之相互作用的蛋白提供实验基础.     

酵母双杂交诱饵载体pGBKT7-PML-V的构建、表达及鉴定

目的:构建早幼粒细胞白血病基因变异蛋白(Promyelocytie leukemia,PML-V)的诱饵表达载体,为应用酵母双杂交系统(Yeast two-hybrid system)筛选与PML-V相互作用的蛋白建立实验基础.方法:PCR扩增PML-V,克隆人诱饵载体pGBKT7中,经测序鉴定后,将构建好的诱饵载体pGBKT7-PML-V转化到酵母细胞AH109中,并利用蛋白印迹法(Western Blotting)分析诱饵蛋白的表达情况.同时检测诱饵蛋白有无毒性、渗漏和自激活作用.结果:成功扩增了PML-V基因片断,并克隆人pGBKT7中,测序结果正确.诱饵载体成功转化到酵母细胞AH109中,诱饵蛋白无毒性、渗漏和自激活作用,Western Blotting分析证实酵母细胞表达诱饵蛋白.结论:成功构建了PML-V结合域的酵母诱饵表达载体,为进一步运用酵母双杂交技术筛选与之相互作用的蛋白奠定了基础.     

用于筛选COPS3相互作用蛋白酵母双杂交诱饵载体pGBKT7-COPS3的构建及鉴定

目的 用COPS3基因片段构建酵母双杂交GAL4系统的诱饵载体pGBKT7-COPS3，并检测其表达产物对酵母细胞有无毒性及对报告基因有无激活作用。方法 运用RT-PCR技术从骨肉瘤细胞系SOSP-9607中扩增出COPS3基因片段，克隆入pUC19质粒，经测序正确后，插入酵母双杂交诱饵载体pGBKT7中，将重组质粒导入酵母菌AH109，检测其表达产物在酵母细胞中对报告基因有无激活作用。结果 成功获得COPS3基因片段，其表达蛋白对酵母菌AH109无毒性，对报告基因亦无激活作用。结论可以利用酵母双杂交GAL4系统来研究与COPS3相互作用蛋白。     

E2F-1截短体的诱饵载体的构建及检测

目的 构建E2F-1截短体的诱饵载体,并进行自激活活性和诱饵蛋白毒性检测,为应用酵母双杂交系统筛选与E2F-1相互作用蛋白建立实验基础.方法 设计引物,PCR扩增E2F-1截短体,引入酶切位点EcoR Ⅰ和BamH Ⅰ,将E2F-1截短体连接至载体pGBKT7中,将构建成功的诱饵表达载体pGBKT7-E2F-1截短体转...     

DNA修复蛋白Ku70酵母双杂交诱饵载体的构建及自激活检测

目的构建Ku70蛋白酵母双杂交诱饵载体,为研究Ku70及其相互作用蛋白在乳腺癌中的作用机制奠定基础。方法采用反转录聚合酶链反应（RT—PCR）法从人宫颈癌HeLa细胞株扩增出Ku70cDNA全长片段,用SalI和EcoRI双酶切Ku70cDNA片段后定向克隆到真核细胞表达载体pGBKT7,获得诱饵质粒pGBKT7-Ku70,经限制性内切酶酶切和测序鉴定后转化到酵母菌株AHl09,在营养缺陷培养基中观察pGBKT7-KuT0的自激活作用,同时利用蛋白质免疫印迹检测诱饵蛋白Ku70的表达。结果Ku70cDNA正确克隆到载体pGBKT,转化到酵母菌株AHl09中的诱饵载体pGBKT7-KuT0经表型筛选证实无自激活作用,蛋白质免疫印迹检测显示pGBKT7-KuT0在酵母细胞中稳定表达诱饵蛋白Ku70。结论成功构建了Ku70蛋白酵母双杂交诱饵载体,并且在酵母菌株AHl09中稳定表达。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.